Kemeco's 4.5 Inch Solar Post Cap


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During the production of 4.5 inch solar post cap, Kemeco Lighting puts such a high value on the quality. We have a complete set of orderly production process, increasing the production efficiency to achieve the production target. We operate under the strict QC system from the initial stage of materials selection to the finished products. After years of development, we have passed the certification of International Organization for Standardization.Kemeco products satisfy global customers perfectly. According to our analysis results on products sales performance in the global market, almost all products have achieved high repurchase rate and robust sales growth in many regions, especially in Southeast Asia, North America, Europe. The global customer base also has obtained a remarkable increase. All these show our enhancing brand awareness.At Kemeco Lighting, customers are able to have a deep understanding of our service flow. From communication between the two parties to cargo delivery, we ensure each process is under the perfect control, and customers can receive intact products like 4.5 inch solar post cap.
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Top Solar Street Light Manufacturers in the World
Top Solar Street Light Manufacturers in the World
Use of Solar Energy Photovoltaic (PV) is the method of generating electrical energy from solar radiation. Photovoltaic energy generation involves a PV module which is constructed from the semiconductor material showing photovoltaic effect. These modules become more and more attractive for obtaining "green" electricity because of their flexibility, ease of installation, constant reduction of production costs, and continuous increase of performance[6],[7]. Solar radiation is the most important and major renewable energy source. During the whole day plenty of solar energy is radiating being unused. If this energy can be stored in a battery in form of electrical energy by using these PV modules and later can be used to run the electrical appliances (such as street light) then no doubt this is the best utilization of the available solar energy.LED Solar Street Light Set ; 40W w/ 90W Solar Panel ; 6000KInstead of going just LED or just solar, we have come with the latest-in-vogue and a mix of both solar lighting technique and LED lighting technique to give you the combined best -- Solar LED street light. Using less of grid power, solar LED street light comes to be far superior than any traditional lighting products such as incandescent lamp, HID/metal-halide lamp and fluorescent lamp. LED Solar Street Light to describe in the best way possible is quite an economical way of saving energy. Not only this, since it does not leave any carbon footprints, it's much more environment-friendly than the non-solar LED lights or the traditional lighting products. In one of the most attractive lighting product designs and superior quality, the entire solar LED street light set consists of a battery, the solar panel, the microwave controller or sensor and the lighting lamp itself when all the other three are in-built inside the lamp. The lamp available in 40W works with a 90W solar panel to convert solar energy into light energy, providing us with 100% savings in energy (electrical energy). The color temperature of the light is 6000K (cool white light glow) and CRI of the product is more than 80 reflecting more than standard color rendering ability. Overall, a great product to provide you with high intensity light, high durability, high reliability, high energy-efficiency and low maintenance without requiring any cabling connection onsite and for use on poles of 15-20 feet height. You have 5 years of warranty from the manufacturer's end for this product. Also, an IP65 LED driver ensures resistance to dust and moisture, making it suitable for all weather-conditions.What do you mean by Integrated Solar Street Lights?SILAN Integrated & Intelligent Solar Led Street LightAll in One (10W, 15W, 20W, 30W, 42W, 48W & 60W)nSolar LED Street Lights present the perfect and cost-effective solution for residentialstreets, parking lots, security, roadways and yards for outdoor general area lightingapplications. Solar LED street lights can be more economically viable and efficient inareas where the cost of providing electricity is expensive due to non-availability ofgrid power or in remote areas or in unreachable terrains. Solar street lights using LED technology generate a very powerful and targeted crisp white light of excellent quality,which significantly enhances illumination and night visibility. LED Solar Street Light is an extremely versatile and robust solar parking lot light, it is perfect for all kind of weather conditions. This compact solar powered street lightprovides extra lighting easily in no time. Installation is straightforward; only 4 boltsneed to be tightened onto a pole. The unit can also be wall mounted. No trenching orconnection to the electric grid is needed. The all-in-one LED solar street light isperfect for retrofitting old electric powered fixture or new installations.· Elegant look IP 65 silver housing· Solar panel, battery, charging circuit, LED driver circuit are integrated in single casing· Aluminum alloy case, built-in pipe mounting bracket· Top quality solar panel battery· 120 degrees wide lighting angle· Motion and PIR sensor for longer battery life· Automatic dusk to dawn operation· No cabling , no battery box· Pole and wall mounting universal bracket· Use it at streets, roadways, sidewalks, gardens, parking lots, public square plaza,malls, resorts and farm house and wildlife area· Battery Backup: 3 nights· Auto dusk to dawn and motion sensor mode after 5 hrsHow Many Hours Would It Take to Install a LED Solar Street Light | Asia LED LightsSolar powered LED Street lights are being utilized all over the globe and as the most recent solar technology, more individuals are switching over to solar powered options. Among the important things which one needs to consider when they buy a LED solar street light is the amount of hours will it require to install a LED solar street lighting. Fortunate for you, setting up a solar LED street lighting does not take a lot of time which can be finished within couple of hours. If you intend to find out the exact hours that will be required to set up a LED solar road lamp, then you need to read the whole overview to comprehend how long it would take and also all the actions associated with the setup process. Planning for all the steps ahead of time will make it less complicated for you to do the job. Installation of the light is not very complicated and nearly any individual ready to invest in a little effort can do it. Step No. 1: The Installment Hole Required to be Dug Once you have where you would like to position the solar LED street lighting, you will require to make sure that a hole has been dug for the solar LED street light to be located right into. The hole has to be appropriately dug so that it would make sure that the light is placed in the hole. There are 2 options for having the hole dug. The initial choice is to manually dig the hole utilizing a shovel. Usually, if there's only one individual doing the excavating, and it could take up to an hour to get the job done. The another choice is for you to opt for the excavator. This alternative only takes around 2 to 3 minutes. Step No. 2: Create the Concrete Foundation Kits The following action needs you to cement an appropriate foundation so as for it to hold the solar LED road lamp post correctly. It ought to about 20 minutes for this if only an individual is doing it. Step No. 3: Produce the Wire Connections You have to be additional cautious doing this job as it requires concentration. Ensure that all the cables have been correctly linked between the battery and the lamps. It may take you another 20 mins if you do it by yourself. Step No. 4: Have the Post Fixed to the Foundation Kits Lastly, the last action involves mounting the post onto the foundation sets. Make sure that the solar LED road lighting is fixed precisely due to the fact that if you do not do that, after that you would certainly need to start all over. The procedure will certainly take you around 5 to 7 minutes to finish if you have a crane and two men assisting. Nonetheless, if you are doing it all by yourself, then you can anticipate for it to take anywhere between 15 and 20 mins. Hence, it can be stated that the entire process of setting up a LED solar road light should not take more than 2 hours to finish.
Can Solar Lights Work in the Dark
Yes, the panels charge batteries that will allow it to work in the dark, until the charge runs out.. .Yes. They put out light in the dark of night and then they charge up when the Sun comes up.. .Solar lights collect solar photon energy during the day through their solar panel. This energy is converted into electricity and stored in the rechargeable (usually Ni-Cad) batteries. A photocell sensor detects whether there is sunlight available or not and acts to switch the lights on based on this. The electricity stored in the battery is regulated by a control board and, at night, the charged batteries provide power for the LED light. Once daylight returns, the panels repeat the process of charge.IBM Thinkpad T20, I want to use some car batteries... how would I do this?If you want longevity but not portability, please plug in the power cable to the power socket. You can run the notebook until the power to your home is cut or your notebook dies. But to answer your question directly, I do not think it's a good idea.How would i power multiple guitar food pedals without batteries?Yes. there's pedalboards and boxes which provide power for multiple pedalsHow to use car batteries for breadboard projects?THOSE SMALL LEAD ACID BATTERIES FROM YOUR LIST CAN PROVIDE AS HIGH AS 30A CURRENT WHILE ACCIDENCELY SHORT BOTH TERMINALS. BURNING THE BREADBOARD WITH SUCH POWER SOURCE AS FAST AS IN SECONDS. UNLESS, AS A SAFE WAY TO USE THEM, INSERTING A 2A FUSE TO LIMIT ITS CURRENT BEFORE LINKING TO BREADBOARD POWER INPUT. THIS WAY, FUSE BLOWS AND CUT OFF 12V POWER IF YOU MAKE MISTAKE ON BREADBORAD CIRCUIT. 12V CAN BE CHANGED INTO 9V POWER SOURCE BY USING A SIMPLE VOLTAGE REGULATOR IC CALLED LM7809.How the batteries in the vehicle recharged during moving?Your vehicle has an alternator, this is similar to a generator. As the engine spins, it drives the alternator which sends power to the batteryiGo electric screwdriver batteries type?if it takes batterys then u should be able to open it some how and then u can tell just on size alone and normally its written on it but if u see a hole in it some where than it probably is a rechargeable driver then u need to find the charger and its not a good idea to open itDoes brand matter for AAA batteries?not really.. but some brands are better quality and will last longer than othersAre my batteries safe to use after I made their contacts touch each other and it triggered a sound and a smell?If was just accidental short circuit then you just release some watts in the atmosphere. You should do a watched full charge. Anyway the charge controller should tell you if is gone. If it is not, carry on and be more careful next time. If they got hot then you just damaged them and you should replace themHow long will these batteries last if the radio has a resistance of 200 ohms?I came up with the same formula as Bill but with 133.3 minutes rather than hours: 240 / .03 = 8000 8000s / 60s/m = 133.3minutes = 2.22 hours Interestingly, the article below (quoting another article!) states: "The amount of charge that travels through a typical alkaline AA battery is about 5 kC = 5000 C = 1400 mAh. After that charge has flowed, the battery must be discarded or recharged." If that were true, we would have 4 * 5000C / .03C/s = 6.67E5 s = 6.67E5s / 3.6E3s/h = 185 hours = 7.7 days. .Solar controller with BJT transistor and PIC24 microcontroller to charge 3.6V NiMH batteriestl,dr: In your case, you do not seem to need charge control at all, and it is more complicated than you seem to sink because of various reasons. Just put a 1N4001 between the solar cell and the battery.The NiMH battery is a quite low impedance, pulling as much current from the solar cell as available at the cell voltage. During charging, it is likely around 1. 4V/cell. This is an output voltage of 4. 2 Volts, so in bright sunlight, you likely exceed the 170mA quoted for the maximum power point, expect something like 200-220mA, which is below C/10 of the cells. I have no idea how you want to do NiMH charging control at widely varying charging currents that never exceed C/10 (no -deltaU, no dT/T seems applicable, but let's ignore that).First thing to notice: Your circuit will not work as drawn. You drew a NPN transistor. It needs a voltage at the base that exceeds the emitter voltage (by around 0.6V) to make it conductive, but the uC has no access to provided the needed 4.8V (battery voltage 0.6V). You need an PNP transistor instead. In that case, you need to to provide current from the base terminal to a more negative sink. Also, you would connect the emitter to the solar cell in that case. Note that to turn off the transistor, you need the base voltage to go up to 0.5V below the unloaded solar cell voltage, this is around 8V. Start with the desired collector current (220mA maximum cell output) and take a look into the transistor data sheet. Let's choose a BC327 for it's higher current rating compared to the typical 100mA transistors. Take a look at figure 4 (Saturation region) if you want to have low losses on the transistor, which seems like a good idea now (but see later). They have curves for 100mA and 300mA collector current. As we do not have a lot of energy to waste, choosing a base current at the low end of the neary flat end of the saturation voltage curve is a good idea, which yields something around 4mA if you interpolate between the 100mA and the 300mA curve. To turn in the transistor, at 4.4V solar cell voltage, 200mV transistor drop, and 4. 2V battery voltage, you need to sink 4mA at 4.4V-0.6V (emitter-base voltage). To turn it off, base must rise to 8V (see above). This means, you need a pull-up resistor between base and emitter, providing the turn-off voltage from the cell instead of the uC and a diode (1N4148 will do) to protect the uC from that high voltage. So the circuit looks like this: PNP with emitter to solar cell, and collector to the battery. A resistor connecting emitter with base (the value does not matter much, and something around 100k will provide enough pull-off effect without disturbing the circuit while the transistor is on), a diode and a resistor in series to the uC. The uC needs to sink 4mA to turn the transistor on. This results in an output voltage of 0. 4V. So the resistor has to sink 4mA while having 0.4V above ground on the uC end and 3.8V above ground on the diode end. 4mA at 3.4V is 850 ohms. So 900 Ohms in your circuit does not seem off that much.You will not be happy at all with that circuit for different reasons, though: Constantly sinking 4mA takes too much of the charging current (getting 220mA outdoor on a bright sunny summer day is one thing, on cloudy days, being inside, expect something like 10mA maximum), and you are wasting 4mA of that just to turn that transistor on. Furthermore, when it gets dark, the solar cells draw power due to their leakage current and discharge the battery by operating the transistor in reverse mode (collector acts as emitter, base current is provided by the solar cells and the 100k resistor meant as pull-up, and the emitter acts as collector). Common wisdow is you need to protect against that, for example by putting a diode between the collector and the battery. You will lose voltage there, though. Another possiblity would be a "secondary pull-up" that will pull the base up, even if the emitter supply (the solar cell) fails to provide power, by connecting a resistor from collector to the base terminal. This resistor has to be low enough to pull the base up against the 100k that pulls it down, so go for something like 20k there. Of course adding all these resistors does not make the thing more efficient.Actually, your charging current is very low compared to cell capacity. As estimated above, you only get to C/12 on extraordinary good conditions, you the charging current can safely be considered as "trickle charging" unless you put the device into the beam of a bright headlight 24/7. You do not need any charge control. You just need to prevent discharge through cell leakage, and this can be povided by a single diode between solar cell and battery
LED Solar Wall Lamp|Solar Motion Sensor Light|Solar Wall Lights|LED Solar Lights|Outdoor Wall Lights
Shenzhen Geshide Technology Co., LTD is a manufacturing & trading combo, strength to the LED lighting products over 10 years. We specialized in outdoor solar wall lights, solar flame lights, working lights and flashlights. We expects to share the most professional, front-end, and most favorable solar powered system with you.Naked-Eye AstronomyHuman awareness of the universe began when people realized that they could observe objects in the sky, and that what they saw changed over days, months, and years. To any observer on the ground looking at the sky with the naked eye, the sky appears to be a vast spherical bowl, a celestial sphere that extends from all points along the horizon to the zenith, the point directly overhead. Astronomical objects seen in the sky are so far away that observers viewing them without the aid of a telescope have no intuitive sense of which objects are closer than others. This lack of depth perception causes everything to appear equidistant on the sky. Any object's position on this sphere can be determined by two coordinates, which designate the object's horizontal and vertical location. The vertical coordinate is determined by measuring an altitude angle upwards from the nearest point on the horizon, and the horizontal coordinate is established by measuring an azimuth angle from due north eastwards along the horizon to that nearest point. This system is called either the horizon coordinate system or the altazimuth system (see Figure 1). About 6,000 stars are visible to the naked eye when you can achieve the darkest conditions. The positions of the stars relative to each other remain fixed from night to night and year to year. In general, stars in the same area of the sky have no physical relationship to each other, but the very human tendency to impose order upon otherwise random distributions yields patterns of brighter stars, or constellations. Many constellations of the Northern Hemisphere have been inherited from antiquity, including Ursa Major, the Big Bear, of which the more familiar Big Dipper is part, and Orion, the hunter, which can be seen in the winter sky. Many Southern Hemisphere constellations were defined in the last century to fill in unlabeled regions of the sky. The sky is now officially divided into 88 constellations, which are used in modern astronomy for naming purposes. For example, the star alpha Ursa Majoris ( UMa) is located in the Big Bear constellation. Therefore, Ursa Majoris comes from the name of the constellation, Ursa Major, and the Greek letter indicates that it's the brightest star within that constellation. In addition to modern names, some 90 or so stars also have names from antiquity. For instance, UMa is also known as Dubhe. Over the course of the night, stars move across the sky from east to west as a consequence of Earth's rotation on its axis. The stars appear to move in circular paths around a celestial pole, or either of two points on the celestial sphere where the extensions of Earth's axis would intersect. In the Northern Hemisphere, the celestial pole is coincidentally marked by the relatively bright star alpha Ursa Minoris, also known as Polaris. Simple geometry shows that the altitude angle of the pole star above the northern horizon is equivalent to the latitude of the observer on Earth. To an observer in the Northern Hemisphere, stars that are always above the northern horizon are known as circumpolar stars; an observer in the Southern Hemisphere would see circumpolar stars around the south celestial pole. Stars that are further to the south and that rise and set sometime during the night are called equatorial stars. Equatorial stars rise in the east, move diagonally into the southern sky, achieving their highest position above the horizon on the meridian (the great circle that extends from due north on the horizon, through the zenith, to due south on the horizon). From the meridian, these stars move westward until they set below the western horizon. The celestial equator is that great circle formed on the celestial sphere by extending the plane of the Earth's equator. The equator intersects the horizon due west and due east. An immediate consequence of Earth's rotation is identifying the preferred directions of north, south, east, and west around the horizon, called cardinal directions, by which humans naturally orient themselves. Minute by minute, over the course of the night, both the altitude and azimuth of a star continually change. To more easily observe and track celestial objects, scientists have defined celestial coordinate systems that are fixed upon the sky and thus move with the stars. The equatorial coordinate system is a projection onto the sky of Earth's latitude and longitude coordinate system. Celestial latitude, known as declination, is the angular position north or south of celestial equation. Celestial longitude, measured around the celestial equation, is known as the right ascension (see Figure 2). Declination is measured in degrees, minutes of arc, and seconds of arc. Recognizing that the stars appear to move once around the sky in one day (24 hours), right ascension is measured not in degrees, but in hours, with 24 hours of right ascension (to distinguish from 24 hours of time) equal to 360 degrees. Like the stars, the Sun rises and sets every day. However, unlike the fixed motion of the stars, the Sun's daily path across the sky varies throughout the year. Twice annually, at the vernal equinox (about March 21) and the autumnal equinox (about September 21), the Sun's position coincides with the celestial equator; it rises due east, moves across the sky following the path of the equator, and sets due west (see Figure 3). At this time of year, the length of the day is the same as the length of the night. During the summer, however, the solar position is north of the equator, achieving a maximum northernmost declination of 23.5 degrees at the time of the summer solstice, around June 21. In the winter, the solar position is reversed, with the Sun at its maximum southernmost declination of -23.5 degrees at the time of winter solstice, December 21. The terms equinox and solstice mark not only specific times of the year, but also specific points in the sky. The vernal equinox is that position on the celestial equator where the Sun crosses from the southern into the northern sky. Celestial longitude (right ascension) is measured eastward around the equator from this point. The Sun's seasonal positions in the sky. Relative to the background stars, the Sun also moves about one degree eastward each day, thus encircling the sky in the course of a year. This ecliptic, or the great circle on the celestial sphere defined by the solar path, is tilted with respect to the celestial equator by 23.5 degrees. Throughout the year, the ecliptic passes through the 12 zodiacal constellations. Because the apparent solar movement is caused by Earth's motion around the Sun, the ecliptic plane is also a projection of Earth's orbit about the Sun. That Earth's rotational equatorial plane does not perfectly match its orbital plane (the ecliptic plane) about the Sun is directly responsible for the annual northsouth movement of the Sun and the consequent seasons. The length of the year is based on the time that the Sun takes to complete its annual path around the sky. During the year, the stars and constellations visible at night change as the seasons pass through their cycle. A year is, in fact, 365.25 days long. To keep the calendar in sync with the actual seasonal passage of time, every four years we have a leap year, or a year of 366 days. The additional day, February 29, makes up for the time lost annually when the 365.25 day cycle is computed as 365 days. The length of a day is based on the time it takes for the Sun to complete its daily path across the sky, from its crossing of the meridian at noon to its next crossing of the meridian the next day. Daily time based on the hourly position of the Sun in the sky, relative to its noontime position each day, is called apparent solar time. To astronomers studying the stars, however, the time of day alone is not a sufficient method for determining which stars can be observed at any given time. Astronomers need to know both the time of day and where the Sun is in the sky to find out which stars they can observe. More specifically, what is of interest to an astronomer is the sidereal time, or the right ascension of the stars that are crossing the meridian at any moment. Sidereal time and solar time are not equal because of the annual motion of the Sun across the sky. The true rotation period of Earth is 23 hours, 56 minutes, but the length of the day is four minutes longer. In one rotation of Earth, the Sun has moved roughly one degree across the sky, thus Earth has to rotate a little bit longer to get the Sun back to the same position on the sky. The solar day is 24 hours long. The actual length of any given day varies throughout the course of the year for two reasons. First, Earth's orbit around the Sun is not a circle, but an ellipse. The Sun's apparent motion across the sky therefore varies slightly, moving more than the average one degree per day in January, but a bit less than the average in July. Second, the solar motion along the ecliptic moves parallel to the celestial equator at the times of the solstices when the Sun is farthest north or south of the equator, but at the times of equinoxes, its motion is at an angle to the celestial equator. What is important for the length of the day is only that part of the solar motion parallel to the equator. This produces a second variation to the length of the day. The difference between apparent solar time (which would be shown by a sundial) and mean solar time (which would be shown by a clock or watch) is called the equation of time. This is a complicated effect involving orbital mechanics (the motion around an ellipse is not uniform), perspective (a moving object closer to the observer has a greater apparent motion), the tilt of the ecliptic to the equator (hence the daily component of solar motion across the sky varies from equinox to solstice), and a geometrical factor resulting from the fact that we are dealing with a spherical coordinate system; this latter you can demonstrate to yourself by placing your thumb on the equator of a globe. Note how much longitude angle it covers. Now place your thumb near the north pole. Your thumb will cover the same area, but as measured in longitude, it covers a much bigger longitudinal angle. And it's that angle that is important for rotation and hence the length of a day. Noon, as defined by mean solar time, can occur as much as 16 minutes late in October or 14 minutes early in February compared to the Sun's actual crossing of the meridian. Observation of the Moon shows that it not only appears to change its position by moving around Earth, but at the same time, the fraction of its surface that is illuminated by sunlight (its phase) also changes (see Figure 4). When the Moon is directly opposite the position of the Sun, it appears totally illuminated, or in full phase. When the Moon is viewed at an angle of 90 degrees from the position of the Sun, its surface appears half illuminated, or in its quarter phase. Between full and quarter Moon, the phase is said to be gibbous. If less than half the Moon is illuminated by sunlight, the phase is crescent. When the Moon is in the direction of the Sun and the side toward Earth is its dark or shadowed half, the Moon is said to be new. The cycle from new Moon waxing (increasing illumination) to first quarter to full Moon, then waning (decreasing illumination) to third quarter and back to new Moon takes 29.5 days, a period adopted as the basis of our calendrical month. The lunar phases are observed because of the changing geometrical orientation between the Sun, Moon, and Earth over the course of the lunar month, not the result of Earth casting its shadow on the Moon. The Moon takes 27.3 days to move once (360 degrees) around Earth as determined by its orbital position relative to the stars; the orbital period is therefore also an example of a sidereal period, a period measured relative to the stars. This 27.3 days can also be called a sidereal month. The time from full Moon to full Moon is longer, 29.5 days, because two motions are involved: the motion of the Moon around Earth and the motion of Earth around the Sun. To become full again, the Moon must move more than 360 degrees around Earth. The lunar month, or lunation, is thus an example of a synodic period, or a period produced as the consequence of two motions. The term synodic month is also applied to this 29.5 day period. Another example of the difference between a sidereal period and a synodic period is the rotation of Earth (23 hours, 56 minutes) and the length of a day (24 hours). The actual path across the sky of the Moon is quite complicated. The lunar orbital plane is tilted about 5 degrees 9 minutes with respect to ecliptic plane. The orientation of these two planes rotate with respect to each other over an 18.6 year period. In consequence, relative to the celestial equator, the lunar orbital plane has a variable tilt that periodically oscillates from 23.5 degrees minus 5 degrees 9 minutes equals 18.3 degrees, to 23.5 degrees plus 5 degrees 9 minutes equals 28.7 degrees. In other words, over the course of the month, the Moon can oscillate north and south across the celestial equator between declinations of as little as 18.3 degrees to as much as 28.7 degrees. Each month the path of the Moon across the sky differs slightly from its path the prior month and from its path the next month. In contrast, each year the solar path around the sky is essentially the same. Astronomers find particularly interesting the two intersection points, or nodes, between the great circles of the ecliptic plane and the lunar orbit. If the Sun and Moon in their motions about Earth move simultaneously through nodal positions, an eclipse occurs (see Figure ). If the Moon and Sun are at the same node, the Moon passes in front of the Sun and a solar eclipse results, lasting only a few minutes in duration. If the two are at opposite nodes, then the Moon passes through the shadow of the Earth and a longer duration lunar eclipse occurs. The cycle of occurrence of eclipses is quite complicated because three factors are involved. The Sun moves around the sky in 365.25 days. The Moon moves once around the sky every 27.3 days. The direction to a node (where the two orbital planes intersect) moves around the sky in 18.6 years. To get an eclipse, all three positions (Moon, Sun, and node) have to be along a straight line through Earth. This event does not happen with a simple pattern of regular time intervals. Nakedeye observers in antiquity recognized five other objects that move across the sky relative to the stars - the planets. The word planet comes from the Greek, meaning "wanderer." Planetary motion is more complicated than that of the Moon or Sun, which move systematically west to east relative to the stars. The planets' usual motion is west to east, termed direct or prograde motion. But in each synodic period, planets show a brief period of motion in the opposite or retrograde direction. Retrograde motion is the result of perspective. Consider, for example, driving on a freeway. You look forward toward a slower moving car. Relative to the distant mountains, it is clear that this car is moving in the same direction you are moving. But as you catch up to and bypass the slower car, you see it appear to be moving backwards compared to the distant horizon. As you pull ahead, once again looking back at the slower car shows it to be moving forward. Observation of other planets from Earth produces the same apparent reversal of motion relative to the background of stars. (See Figure 6).
Best Quality 60W Solar Street Light in Pakistan
Rated 5.00 out of 5 based on 3 customer ratings Rated 5.00 out of 5 based on 3 customer ratings With growing concerns on electricity shortages and keeping in view high fares, Ultronics has introduced Solar Street Lights with 60 Watts power. This solar street light is a complete solution for people choosing to move on alternate energy solutions. This solar light is built with high quality ABS Material that stands tall under tough conditions. An ideal selection for housing societies, parks, factories, mines and open warehouses this light is IP65 certified which means it is completely water proof. Back up Time: 6-8 hours (on full mode) when charged under bright sunlight1. how can i made a circuit for solar street light?You could be using leds or a compact fluoro for this. These will be for use with a 12V battery. It may be you want to reconsider using 40W, as less power is much more feasible. About 10W of CFL or LED supply will be the same as a 40W incandescant lamp, and last much longer. If using leds you will need an efficient switch mode current regulated source to drive them. You can expect similar efficiency to a compact fluorescent lamp. The leds will need heatsinks. The size of the battery and the panel are critical parts of the design. The power supply would be a 12V battery. The light runs at night only. WIth some care the solar panel itself can be used as a sensor to switch on the lights by measuring the battery voltage. When under charge it will be around 13.85V, using a float charger. The current is inherently limited by the panel. A simple but effective charger is to connect the solar panel by a switch (P channel mosfet as a high side switch or relay) when the voltage is below 13 volts and disconnect it when the voltage approaches 14V (lead acid battery). Use a reverse blocking diode with the panel. Note that gel type batteries are not very suitable for operation in sunlight in the tropics at least. When the battery is below 12.6V consider it as night time. Otherwise use a separate sensor for sunlight. Thus you have three voltage comparators for these 3 voltages. These can be a schmidt trigger with the correct hysteresis. You need a reference supply. A small 5V regulator is simple. This uses a solar panel designed for charging a 12V battery, meaning it has 36 cells. The OC voltage at standard conditions is 22V. Look up data sheets specs for panels. If the lamp runs 12h per day, and the power is 10W, then it uses 120Wh per day. With a 12V system this is 10Ah. The battery needs to be at least 10Ah, especially considering overcast days, and the need to not discharge it below 50% of capacity. This looks like a 40Ah battery therefore. The maximum charge rate should not exceed 4A (10h rate). The solar panels must provide 10Ah per day too, but... The battery takes 140% of its discharge to recharge, so now 14Ah per day. Allow extra to catch up after a period of overcast weather, at least 20Ah per day. The rated current occurs with full sun. There is an equivalent of full sun hours for your region, likely 2-5h a day. In the tropics 5h per day. Thus we need 20Ah in 5 hours, so a current of 4A. This agrees nicely with a 40Ah battery. So for a 10W lamp operating 12h a day in the tropics we need something like a 40Ah battery, and a 4 amp x 36 cell panel. This will be rated around 15V * 4A = 60W. A bigger panel is ok within reason, but should have a bigger battery so it does not charge too quickly. A bigger battery may be needed to increase the lifetime, and allow a reasonable number of days without sun if overcast weather lasts more than a day or too. The electronics should all be designed for outdoor use, vermin proof, including rats to ants, weather-proof and able to operate at 60C ambient temperature. The link below has an example of a P channel mosfet high side switch driven by a voltage comparator. Use a 10A or more rated switch and the comparator needs a reference so it turns on at 14V and off at 13V.2. All in One Solar Street Light Manufacturer with Best Price in IndiaAll In One Solar Street Lights All In One solar street light is a new-age form of lighting solution integrating solar panels, charge controller, LED light and battery. These lights are available in two varieties, with infrared motion sensors and without, as part of the unit. All In One solar street lights are becoming popular due to their compact design and multiple other advantages. Motion sensors help to adjust the LED brightness intelligently in All In One street lights. Infrared (IR) and passive infrared (PIR) motion sensors are used for motion sensed detection of emitted/reflected infrared energy. The All In One solar street lights with motion sensor switch on in the evening and after a time delay of 30 seconds, the lights automatically reduce their brightness to 20%. Motion sensor is capable of detecting infrared waves that radiate from moving objects, thereby electronically increasing the brightness of the lights. Once motion is detected, there is 100% brightness and if there is no motion detected in the area after the time delay, the light gets automatically adjusted to a dim mode of 20%. The biggest advantage of solar street lights with motion sensors is that they add a sense of security and safety to your property while providing better battery life. Features of All In One Solar Street Lights Controllers used in All In One solar street lights PWM or MPPT charge controllers are used in All In One solar street lights. PWM controller acts as a switch between the battery and solar panel. The battery is charged with constant 3-stage charging, i.e., bulk, float and absorb. Pulse width modulation or PWM is the technique to modulate the pulse width to change the voltage and frequency of energy from solar panel to charge the battery. One of the greatest pros of PWM controllers is that it helps to prevent overcharging while charging the battery. As for the cost, PWM controllers are less expensive compared to MPPT controllers. MPPT (maximum power point) controller offers an indirect connection between the battery and the solar panel. The DC/DC converter takes extra photovoltaic voltage and transforms this into additional current at lower voltage. MPPT controllers adjust the voltage to maintain the most efficient level of power. In cooler conditions, MPPT controllers are observed to be more effective than PWM controllers due to their ability to capture extra PV voltage. Solar panels used in All In One solar street lights Though both monocrystalline and polycrystalline solar panels are used in solar street lights, polycrystalline solar panels are most commonly used in All In One solar street lights due to their cost effectiveness. Since most of the All In One solar street lights use motion sensors, they do not require solar panels with more wattage. Batteries used in All In One solar street lights Lithium ion phosphate (LiFePO4) batteries are widely used in All In One solar street lights due to their multiple advantages. LiFePO4 batteries offer upper and lower voltage protection and longer lifespan. These batteries can operate in different temperature range and are maintenance free. LiFePo4 batteries are the perfect choice for All In One solar street lights due to their relatively small and light feature. Lithium-ion as well as lead acid batteries are also used in some All In One solar street lights. Light source used in All In One solar street light LED light source is used in as it consumes less energy and gives higher luminosity. Installation of All In One solar street lights Compared to integrated solar street lights, the installation of All In One solar street lights can be carried out easily. The All In One solar street light can be effortlessly mounted due to its compact size and also due to the fact that there are no wires or cables to connect. They can be installed either on a pole or on a wall. The pole should be fixed to a flat ground without inclination. The light fixture should be installed to the pole before erecting the pole. The pole should go at least 3 feet deep inside the ground. The basic cage must be secured to the ground using concrete. It is essential to place the poles at even widths to provide uniform brightness to the entire area. The poles must be placed in the right position and angle so that the panels get sufficient direct sunlight throughout the day. Since All In One solar street lights have dusk to dawn feature, they need very minimal maintenance once installed. Rain water washes away most of the dust and dirt off the solar panels; however, routine cleaning of the panels helps the efficiency of All In One solar street lights. The solar panels can be cleaned by wiping them with a soft cloth or spraying water with a jet spray. Occasionally, you may inspect the installation bracket and the mounting arm to look for any damage. The All In One solar street lights are automatic in its function. They are operated with infrared motion sensor which helps to detect movement in its field and illuminate the lights, thereby ensuring security. Also, the controller can be set to operate in a timer-based manner where in the lights operate in full brightness for the first four hours and then later, in lower light for rest of the time. With the motion sensor and dimming options, the All In One solar street lights tend to save energy, thereby guaranteeing longer life to the lighting fixture. No cable work or electric equipment is needed, so the installation/construction cost is lesser. No need of manual intervention after installation, so the management cost is lesser. The lights are powered solely by using solar energy and no conventional energy is used, so the operation cost is lesser. Installation is easier and faster and maintenance is very minimal. Compared to integrated solar street lights, All In One street lights are less expensive. Since All In One solar street light requires direct sunlight to give its full potential at night, it may not be able to meet requirement of the areas with insufficient sunlight. Since having shadows may obstruct the sunlight to fall onto the solar panels to charge them efficiently, installation sites may be limited. Initial investment to purchase All In One solar street light is high compared to traditional lighting system. However, the benefit of advantages is far beyond the shortcomings of disadvantages. With the technological advancement, All In One solar street lights will be more and more used in the coming future.3. Recycling light from solar street lights.?No,the theroy for solar street light work in night is get the electrcity from the battery,the power in batter can last 1-2 days
Solar Street Light Market Is Growing Globally
The solar street light industry is growing exponentially with governments and organizations across the country and the globe offering incentives for solar installation. In the United States over 200 city mayors and city managers have committed to going 100% renewable by 2030. This growth is also being fueled by the increasing cost of traditional fossil fuels such as coal and natural gas power plants while renewables are going down. Renewables just surpassed fossil fuels for the first time ever last month. The government of India is planning to replace 35,000,000 street lights and almost 800,000,000 incandescent light bulbs with LED lights.Solar installers say cost per kw-hr is total charge/kw-hr from elect. co., but why would elect co agree to free use of their grid?The electric company is probably already charging you a connection fee and for the average household, that fee should not depend if you receive, send power, or how much power you use. (It is a little more complex then that) But that will not prevent them from trying to maximize profits while they still can.What improvements are needed to make pv Solar Installations better?Snow is a much more difficult problem. An inch of snow overnight pretty much trashes power output until it melts off or is swept off. Right now, my solution is a ladder and a long-handled squeegee. A better way would be appreciated. ----how can I find an pv solar installer to get some experience?hi, i would use and find companys in your area and ask them if you could do some free days with them to gain experience. Im sure they would not mindHow many kW can an average village in India run off of? (Iu2019m looking to do solar installations.)Respectfully Quora is not the place to ask a question like this. You and you alone should be answering this question. The fact that you don't know the answer means that your education in the field of solar energy is woefully lacking. An organization called SEI or Solar Energy International, based in Paonia, Colorado, USA has many online solar programs and some of it is tailored to the developing world. Google them to get their website and I highly recommend their courses. Most of my formal education in solar is with them. How many kW can an average village in India run off of? (I'm looking to do solar installations.)10 tips on how to choose solar panels company - Guangdong Prostar NewFinding a great solar panels company to install your solar panels can be intimidating. Follow these tips to help make the right choice. There are a lot of solar companies out there. How do you choose? If you've read our Solar Panels Installation Manual from the start, you've made sure your is house energy efficient. You know more than you ever thought you would about the electric grid and the carbon footprint of solar panels versus fossil fuel power plants. You've done the math and figure that you are going to save thousands of dollars over the next two decades if you install solar. And you know how you are going to pay for it all. People get a little nervous about picking a solar installer because solar technology is still unfamiliar to a lot of people. Pretty much every homeowner has had to call a plumber at some point, but solar... that's something most people have never dealt with. How do make sure that you find the best contractor? In many ways, hiring a solar contractor is much the same as hiring a contractor to do any home project. Do not be intimidated by the technical nature of solar: if you do some due diligence and ask the right questions, you will be fine. This guide will help. Now what? How do you choose the best solar installer? Here's the tips that will help guide you to a good decision: Get in the right mindset We do not want to scare you or anything, but just be aware that buying solar is more complicated than. But it's also less work than remodeling your kitchen. So be prepared to do some work, but it's really not that bad. Just go into it with the right frame of mind. You are hiring a contractor. You will need to carefully review a contract and make a couple decisions, but not nearly as many decisions as if you were redoing your bathroom or kitchen. On the other hand, there are some companies out there that want make the home solar buying process a little bit like picking a flight or a hotel. We think that this is bad for the consumer for a number of reasons. First of all, this approach emphasizes price over other important considerations. It's okay to just go with cheapest option if you are , say, renting a car for the weekend - one company's Toyota Corolla is the same as a Corolla from any other. But solar panels are a product that are going to last you 25-30 years. Workers are going to come to your house and bolt a lot of equipment to your roof. It's a major purchase, so it's important to really understand the details of the product before you make such an important decision. Second, it encourages people to gloss over the important details of the equipment that you are buying. You might be prone to do this because solar can involve an intimidating number of technical aspects like watts, voltage, AC/DC, efficiency ratings, electric meters and monitoring systems. But, we promise, you do not need an engineering degree to figure this stuff out. So do not just make your decision on price. Consider the quality of the contractor and the contract details. Imagine that you want to do a big home renovation. You are going to make your dream kitchen! It's going to look just like the magazines. So you come up with a wish list of things that you want to have: shiny stainless appliances, granite countertops, a big island, wine fridge, that sort of thing. Oh, because you've got an older home where everything is a little bit crooked, you want the contractor to tear everything down to the studs and also install a new floor. Then you come across a website that promises to give you an accurate quote for all of this, just by filling out a form. No phone calls. No contractor will even come to your home to take a look around. Would you trust a quote like that? No, obviously not. If you are doing a kitchen remodel, a competent contractor needs to make a site visit so they can identify problem areas that will cause labor or materials costs to go up. Are there structural aspects to the space that will make the work more difficult? Is there electrical or plumbing work that needs to be upgraded? Is there a chance that your floor tiles have asbestos? All of these things would cause your estimate to go up, but none of them can be identified without a person coming to your home. Problems that cause solar costs to go up Solar panels and racking are heavy and last for decades, so a good contractor will need to evaluate the condition of your roof. Is the roofing material and decking in good condition? Do you have roof drainage issues that need to be addressed first? What is the size of your current electric service panel, and will it handle the additional load? Do wiring or circuit breakers need to be upgraded? Do you have landscaping that will cause shading problems after a few years' growth? Nobody on the internet can promise an accurate quote for your solar project if they do not come to your home to assess these kinds of things. A lot of people do not like sales calls. That's understandable. But for a project like a solar installation, you have to make an exception. In this case, you are going to get a phone call, and somebody is going to come to your house. This is a good thing. Get more than one quote Just like with your dream kitchen project, you need to get multiple quotes. This is not only to get a fair price, but also to compare the different materials, warranties, and credentials of the companies that you are evaluating. For example, one of the most important details of a solar installation is how the racking is secured to the roof and waterproofed. Ask the contractor exactly what methods and materials will be used. What is the fastening system, and what flashing and sealants are used to waterproof it? Or, maybe one installer insists that microinverters are the only way to go, while another contractor says that they would use string inverters for the project. In that sort of situation, you need to be prepared to ask each contractor why they selected one type of equipment over another. Never select a company only on price Everybody likes to save money, but do not save money on your solar photovoltaic system by simply going with the cheapest quote. There are real differences in equipment and installation quality . While it's very possible that your best installer will also be the cheapest, you can not know until you closely evalulate the details of the contract and materials. Conversely, going with the most expensive installer does not guarantee higher quality either. The biggest solar panels company installers, usually do not want to sell you a solar system. Instead, they tend to push you to rent one instead using financial products such as solar leases and power purchase agreements (PPAs). These financial products result in higher profits for them, and a lower financial return for you. There are a number of reasons why these financial products are often bad for consumers, but one of the key reasons is the inclusion of escalator clauses that automatically increase your cost of electricity every year, even if the utility company holds their prices flat. In addition, many of these large national installers have poor reviews and have even faced lawsuits by state governments. Prefer local companies that have been in business for a long time When you get a quote, we prefer local solar panels company that have been in business for a long time and have a strong presence in the community. Quite often, these are electrical companies that have decades of experience that have added solar installation to their portfolio. One reason is the obvious fact that a company does not stay in business for decades if they do lousy work. But the most important reason is that in order for a contractor to honor their labor warranty with you, they need to still be in business. The labor warranty, which is separate from a manufacturer's warranty, could be 5 to 10 years long, and even more with a few companies. With the explosive growth of residential solar across the country, a lot of new companies have sprung up overnight, especially in states like California. A company that has been in business for only a couple years might do great work, but running a company profitably for decades is a different skill than installing solar panels. Your best chance of having a company be around to service your system years from now is to pick one with a long track record. Be wary of brand new solar companies that have been in business for only a couple years. If you are independently doing research on solar installer companies, be selective about the review sites that you use. You will find sites, including ones that specialize in reviewing solar installers, that allow companies to appear as featured companies in their listings in exchange for a fee. This is a controversial practice , one we think that is misleading to the consumer. Which sites should you trust? Start with the, which contains both reviews and a platform where consumers can file complaints with the Better Business Bureau, and companies are able to respond. Google Local Business is another site we think is reliable and does not offer paid placement. A few years ago, Yelp was accused of extortion , but the class action that followed was dismissed, and we think the company answered the controversy reasonably. Fake reviews are a different issue, and one that is more difficult to address. For this reason, we recommend you start with BBB, which uses human reviewers to check submissions. Check that your contractor is licensed The first thing to do is understand what type of license is required by solar installers in your state. The Interstate Renewable Energy Council maintains a website that lists what is required. Be aware that licensing for solar photovoltaic (PV) may differ from the requirements for solar thermal (which is used for hot water heating), so read carefully. Once you know what the requirements are, you can ask your contractor for their license so that you can look it up at your state's licensing board. California and Nevada, for example, make these databases searchable online, and also tell you how long the license has been active and whether the contractor is bonded. Check online to see what your state provides. Many companies list their license number right on their website, so you can do this check in just a few minutes. Never work with a company that is not properly licensed. There are many different components in a photovoltaic system, and each is covered by a different warranty from their manufacturer. It's crucial that the installer fully explain each one. The solar panels company should provide a warranty of the workmanship and components of the system, and cover the labor and replacement costs of any failing components. Photovoltaic panels have their own warranty, and often this is specified in two parts: one warranty covering materials and workmanship, and another warranty period covering their power output. Solar panels normally degrade over time, producing a little less power each year. (This degradation should be less than 1% per year.) The panel warranty will certify that it will continue to produce a given percentage of the original power output after a number of years. A 25 year power warranty is typical, and the product warranty should be at least 10 years and is sometimes long as 25. The inverter system is a critical part of the system, and will have its own warranty period. 10 to 25 years is typical. The racking system needs to hold up to potentially extreme weather for a couple decades. You want to make sure it has a strong warranty - at least 20 years. Are you getting batteries? It's a pricey component, so be sure you know what the warranty is. Meet your solar panels company contractor in person and ask a lot of questions We mentioned already that you should always have a face-to-face with your potential solar installer, right? Once you have an actual human person in front of you, that's the time to ask some important questions. Sometimes, the first person you meet with wo not be technical and can not answer all your questions on the spot. They might need to consult with other people on their team. That's okay. Just be sure that all your questions are clearly answered before you sign a contract. If you have not already checked that the installer has the proper licensing for your state, now is the time to do so. Also ask if their installers are NABCEP certified. What incentives are available? Use our calculator to find out about major incentives, but your solar installer may know about other local rebates. Be sure to understand if the owner receives the credits, or if the installer does and passes them onto the customer. Confirm if net metering is available to you, and make sure that you clearly understand how it works. (You can read our article What is net metering? for a primer. The estimate should list the price of individual components and labor: modules, inverters, racking, labor, electrical work, and other costs should be itemized. The contract should indicate exactly when payment is due, and what the payment schedule is (if any). You will receive a site plan that visually indicates the layout of the system components on your home, which includes the placement of the panels, inverters, disconnect switch, and meter. The installer will give you an electricity production estimate for the system in a year with average weather. Compare this with your average usage, and make sure that you are happy with the system output. Ask about labor and component warranties. Discuss the details of the solar panels, inverters, and racking system. Systems that are tied into the grid will require approval from the utility company, and possibly an inspection. Ask about the requirements and timeline of these. Your local code may require an engineering structural inspection before work begins, and an electrical inspection after work is completed. Ask what is required and when in the project timeline they occur. Your interconnected pv system will most likely require that your utility company install either a new bidirectional meter, or a second meter alongside your existing one. There may be a fee charged for this. Be sure to ask. Find out how you will monitor the system output. This will either be a display on the inverter, or a website or smartphone app. Ask if there is recommended system maintenance. If your roof needs repair, find out labor charges for removing and reinstalling the hardware. For component failures that happen after the installer's warranty, ask about the process for making a manufacturer warranty claim and having the component replaced. What are the different types of Uninterruptible Power Supply (UPS)?
For the LED Solar Street Light, Good Quality and Low Price Competition
For the LED Solar Street Light, Good Quality and Low Price Competition
This guide contains information regarding the installation and safe handling of solar street lights. All instruction should be read and understood before attempting to install. The installer should conform to all the safety precautions in the guide when and installing the lamps. Local codes should also be followed in such installation. Before installing the solar street light, the installer should become familiar with the mechanical and electrical requirement for such a system. Keep this guide in a safe place for future reference (care and maintenance) and in case of sale or disposal of all the solar street lights The solar street lamp installation is different from traditional one especially for solar panel and battery. The installation and construction procedure is as below: location selected, cement base pouring, preparation in field (battery placing, solar panel and bracket connection), post assembling (threading, light installation, panels and brackets mounting), pole lifting, battery connection, controller fixed, post location re-checked, and final inspection. According to factory providing information and our actual demand, we suggest post height and embedded items dimension as below: According to embedded parts dimension to ensure hole size, especially reserve enough place for battery. Details as below: Use C20 standard concrete to pour,and tamp cement base heavily with bobbing machine. When pouring, do not make concrete splash whereon screw rod to slow down installation. When threading PVC pipe, take as the drawing requirements to make sure no concrete inside. Notice there is 250mm gap between down pipe terminal to flat surface. Finally make sure the surface is horizontal with a tester to ensure four feet in the same level. 1.As the installation requirements, prepare all the necessary tools and list them 2.Transport and carry all the components listed, and check the quantity and models one by one. Before operation, make sure battery models are the same as configuration listed (if a group, make sure connection method first. If in parallel, should not be over 4 pcs). Connect each terminal firmly and place them in battery cabinet. Seal the cabinet well with screws to avoid water seepage. Next put the cabinet in the hole and cover or bury it. What doing it, choose a fine day. After burying finish, check the voltage whether normal or not. Fix the panel into the bracket firmly with screws and connect as the requirement (in series or parallel).After connection, make a test for the output voltage whether meet the installation. In general, the tested voltage should not lower than 18V in 12V system. If 24V system, the voltage not lower than 36V. Check the installation position and direction. Confirm the length of wires stripping required. Each terminal should be peeled out 150mm in general. And then install lamp and check the position and levelness based on post. After wire connection, notice the positive and negative poles and inspect terminals whether fixed hard. All these done should according to the drawing picture. After finish lamp installation, use a multimeter to test the resistance and check there in no ground connection with the pole body. And then connect the battery to do light test. Before lifting, prepare all the necessary tools, such as spray paint, Rohan pull, hammer, allen, screws and etc and clean the cement base. When lift the pole up to 1m high, .adjust direction of solar panel and fix it. Do make sure the direction face the south. Meanwhile, spray paint if possible. In the process of lifting, notice the speed and direction, meantime, people should help pole up. Slowly drop the pole and give a right order to the hoist man. Keep screws symmetrical when tighten and use the Strength stem when fix M24 and above screws. The stem should not be less than 1.2m. Four feet should stand balance and upright. Operate as the manual instruction, battery connection first, load (light) second (light on or not, if on, check and change new one), solar panel last (observe light status. if off is normal. Some kinds have delayed function, off delayed for 3-5minutes is normal). When operation all these, do not mis-connect positive and negative terminals so as not to shock or destroy circuit. Close inspection window well. Finish above operations, re-check the post balance and stand level. Meantime, do antiseptic treatment for the screws and clean all the dirt on the post. Contains: light status, solar panel position and direction, stand level, quantity and etc. Summarize and analysis the entire project items for further maintance reference.1. Guide to buying a solar street light with the poleIn almost every neighborhood today, buying a solar street light with pole present in different parts is not difficult. The good thing with this is that the solar street light does not consume a lot of energy that the regular street lights do. The main reason why a lot of individuals do not go with the solar street light is that lighting the streetlight properly involves a lot of energy going out. The amount of energy that would be spent in powered a regular lamp will completely drain your finances within a set time. The solar street light with the pole is very unique, and the good thing is that you get better results with even lesser energy spent. Using the energy from the sun, you do not have to spend so much on fossil fuels that could even cause more danger. In recent times the use of solar street lights with pole has been greatly accepted. The pole also serves its unique purpose. The main purpose is to hold the light up high so that it will be able to shine out to a wide area. The longer the pole is, the wider the shining range would be. When the solar street light with a pole is installed, even if it is in a windy season, it will still stand and not fall. Types of poles to consider when buying a solar street light with pole There are a lot of poles you can use when trying to install a solar street lamp. We will discuss the kind of poles you can choose to use to get the best benefits. Metal poles are very useful and so far, they are one of the most highly used in any street or neighborhood. They are very sturdy and when they are installed properly, they can last for a very long time. The unique light about metal poles is that it can be installed in such a say that the hinges can allow you to bring down the pole and bring it up in record time. When working with the metal poles, you will always have to maintain it. This is because, over time, the metal poles may get rusty. Concrete is a mixture of sand and cement to form a mix and used for the construction of poles. Concrete poles are very sturdy and when they are built, it is difficult to pull down. One thing you must know is that, if you are sticking with the concrete poles, maintenance of the solar street light will be more difficult because you will always have to climb the pole. There are a lot of solar street lights with pole present that you can use. During your installation process, you need to use the kind of pole that will be convenient for you during maintenance. Maintenance is very important. If you do not have any idea how to deal with the installing and mounting of a pole, you can consult Clodesun to get the job done for you with ease. You will always get the best results.2. What is price difference between solar street light and traditional street light ?What is price difference between solar street light and traditional street light ? Traditional street light which is mentioned in this text is powered by public electric grid. The effectiveness of solar street light and traditional street light. 1) The installation of traditional street light is complicated, at first it need pave cables, it need dig ditch, paving concealed conduit, getting through wires inside conduit, backfill, etc, then it need a long time to install and debug, it need large-scale rework if any circuit has problem. In addition, the request of terrain and circuit is complicated, the cost of labor and accessories are high. The installation of solar street light is easy, it does not have to pave complicated wiring when installing, just need create a cement base, then just need use tempered glass screw to fix it. 2) The electric cost of traditional street light is high. Traditional street light has fixed electric cost when it work, it need continue to maintain or change for circuits and other allocations, the maintenance cost is increasing every year. The electric cost of solar street light is zero. The investment of solar street light is in one-time, do not have maintenance cost, it just need 3 years to return investment, then getting revenue in a long term. 3) Traditional street light has potential safety hazard. For traditional street light, In many aspects, such as construction quality, reconstructing for landscape project, materials degradation, abnormal power supply, conflict in electrical conduit, etc, it brings many potential safety hazard. Solar street light does not have potential safety hazard. All of solar street lights are lover voltage products, secure operation and reliable, environmental friendly, It can reduce maintenance cost. From above, Solar street light is security and no potential safety hazard, energy-saving, environmental friendly, easy to install, auto to control, maintenance free, etc, these traits can bring obviously advantages for construction of municipal works. The price comparison between solar street light and traditional street light: Take a project in Beijing as an example, a street whose length is 5km, width is 20m need be installed street light along the street. Take 40m interval between each two lights, and symmetry arrangement, it need 250pcs street lights totally. If the price of traditional street light is US$1000/set, every inspection shaft need be set up in each lamp-post, the price of solar street light is US$2,600/set. The difference for them is main as below: 1) In terms of the first investment, the cost of solar street light is higher than traditional street light. 2) If taking its lifespan as 25 years, considering operation and maintenance cost, the total cost of traditional street light is higher than solar street light within their lifespan, and the scale is larger, the cost of traditional street light is higher. 3) The operation and maintenance cost of traditional street light is higher than solar street light, and the cost is higher with more long time to use. 4) Solar street light is safety and stability, maintenance free, do not have potential safety hazard and solar light can be changed to control to enhance its stability. While traditional solar street light has potential safety hazard, the electricity would have leakage if having some flood disaster. Above all, solar street light can save total investment from the long run, high cost performance than traditional street light, it is environmental friendly resource and renewable energy, one time to invest, it can be used in a long time.3. Is a solar charge controller necessary for a low power panel?dear sir we r manufacturer of solar street light and solar home lights and solar charge controllers we sell at very very cheaper prise kishan patel 919427070583 91-79-22950308
Solar Garden Lights Benefit Your Garden and Our Green Earth
So, when it comes to solar garden lights, there are many benefits and a few cons as well. We will cover those in this article so you can decide if these types of lights are right for your garden. To begin with, there are a variety of reasons why people choose solar. One reason is for the sustainability of the lighting source. We will probably be outlived by the sun, just a guess. For this reason, we can be assured that our solar lights will never need to find an alternative form of power.In relation to this, because your lights will be powered by the sun, they will not be causing an increase in your utilities. This is a benefit in two ways. Not only does it decrease the cost to you but it also decreases the footprint on Mother Earth. With less utility usage, you are doing your part to be a 'green neighbor'. This might even make your neighbors green for other reasons when they see how nice your garden is illuminated.This happens to bring up one possible downside to solar lighting. In the event that you have a rainy day, overcast or snow covering your solar cells, the lights will not work. Since unlike your home solar power unit which has backup power from being connected to the grid or alternative generator power, your garden lighting is not that sophisticated. If the weather is bad, your lighting will not be there. Just a small downside as it does not take much sun to power these lights.A second reason in the 'pro' side of this debate is that they are much easier to install than traditional low voltage lighting systems. With the majority of these solar garden lighting styles, it is as simple as sticking them in the ground as far as installation goes. It doesn't get much easier than that. Traditional lighting requires digging trenching and laying wires. Then, you have to figure out how to connect them to a power source. Oh, you'll also have to put in a timer if you want them to automatically come on. Solar lights do this per the cycle of nature's own clock of dusk and dawn.However, here is another dilemma with solar garden lighting. The solar lights are less intense in the light they give off. Meaning, they are not as bright in some instances as a low-voltage system. The warm, muted hue that solar lights give off is perfectly acceptable for most homeowners in their given applications. Some people, however, would like to create a more bright path or brighter accents. Even if you chose to use a combination of traditional and solar garden lighting you would still be doing your utility bill and Earth a good deed.
Best Quality Integrated Solar Street Light All in One
sqi led 60w solar post light with cctv solar street light products 60w. was r1 799.00. now r899.00 . view offer. 11% off. solarway uranus solar flood light 1500 lumen. was r899.00. now r799.00 . view offer. 5% off. sqi 25 led solar powered led wall light set 12-pack. was r899.00. now r849.00 . view offer. 18% off. the cps warehouse light rope solar cool white led with 192 globes & panel 8m. was r655.00. nowgel battery long system introduction solar street light, Solar Battery - Types, technology, price, brands and allSolar Battery. Solar battery also known as solar panel battery, solar power battery or solar battery storage. It refers to devices that store energy generated from solar panel for later use. Solar battery designed to connect with solar charger controller or solar inverter for power backup. You may buy garbage integrated solar street light. Choose the four parts correct, you will get the neata street light garden lamp use long life solar geldailyart 30w solar street light 90 led solar lights outdoor ip65 waterproof solar street light with motion sensor dusk to dawn security light for yard, garden, street, basketball court, gutter 6000k 4.2 out of 5 stars 24 solar street lights - cleanarc power | cleanarc powerdesigned for simple installation as A solar battery is one that receives its energy from the sun or from some other light source through the use of photovoltaic. In most cases, a solar-powered battery is implanted in an electronic device and not capable of being removed. A solar powered battery is usually capable of fully charging after just an hour or two of exposure to sunlight. Solar Street Light. A battery based solar street light is a stand alone system, which will store electricity generated by solar panel in solar battery.Solar LED street light is powered by photo-voltaic panel, generally mounted on the light structure or integrated in the pole itself. Mighty Max Battery is an industry leader in SLA, Lithium, Motorcycle, GEL, Powersport, Wheelchair and all general batteries. We are a proud member of the US Small Business Chamber of Commerce. hunting for solar light for road manufacturer?Malawi specialized in intelligent aluminum alloy case waterproof 180w solar street light, solar street lighting system. mobile: 86-139 2539 5351 e-mail : Malawi newest design outdoor park road lighting ip65 solar powered street light GES Solar Street Light. Solar Lights 18 Lights for indoor, outdoor and street lighting applications, for 12V, 24V and 48V DC input. Lumina Ecolite Outlite SOX, PL street light LED street light Glowstar Street Lighting 22 Complete self contained system with column, lantern, battery, module and controller. Glowstar Lantern 23 Glowstar GS5 (5 Watts) and Glowstar GS7 (7 Solar Battery. Solar battery also known as solar panel battery, solar power battery or solar battery storage. It refers to devices that store energy generated from solar panel for later use. Solar battery designed to connect with solar charger controller or solar inverter for power backup. All types of solar system run the connected load in the day time during sunlight and export the extra 1/1/2021 cheap supply super outdoor lamp ip65 solar led street light with separate solar panels. for indoor solar light what is commonly used are fuloon 80w led solar street light light street lamp (8w with a separate solar panel. this solar panel is installed independently from the light. you can place the solar panel away from the light and to an area where it is directly exposed to sunlight for efficient charging. Deep-cycle batteries - Trojan Battery Company is the worldwide technology expert for long-lasting deep cycle flooded, AGM, gel and lithium batteries. In addition, we have become one of America's most successful deep-cycle battery manufacturers. Solar Battery Calculation: How to Size the Battery for 7/2/2018· if the battery's capacity is 100KWh, only 60KWh can be released to power the solar system, its DoD is 60%. Therefore, the DOD is a very important factor in the calculation of sizing the battery for solar street lights. as we known, a LiFePO4 battery type's DOD is 80 percent, while GEL battery DOD is . SOLAR STREET LIGHTS; DC BREAKERS ACCESSORRIES; SOLAR PUMP INVERTERS; OUR SERVICES; OUR PROJECTS; Deka Solar Battery, 6v, 420 at C100, 370AH @C20 MK Deka Solar Gel Battery 12V, 210Ah - 8G4DLTP-DEKA Read more. ROLLS S2-1046 GEL, 920AH 2V Read more. Rolls Surrette S-550 Read more. Rolls Surrette S6-460 AGM 6Volt L16 Battery Read more A gel battery is a valve regulated, maintenance free, lead acid battery. Gel batteries are extremely robust and versatile. These type of batteries produce few fumes and can be used in places without much ventilation. How does a gel battery work? A gel battery s a valve regulated, lead acid battery in which a pre-determined quantity of an Solar Battery Storage Systems: If You Ca not Tell Your . If you choose to use a gel battery bank, the charging voltage must be limited to a very precise range. In addition, gel cells are more expensive than flooded cells, do not provide much better amp-hour capacity and will generally not last as long as FLA. When you buy a gel cell, you are paying for extra convenience, not extra capacity. SOLAR STREET LIGHTS; DC BREAKERS ACCESSORRIES; SOLAR PUMP INVERTERS; OUR SERVICES; OUR PROJECTS; Deka Solar Battery, 6v, 420 at C100, 370AH @C20 MK Deka Solar Gel Battery 12V, 210Ah - 8G4DLTP-DEKA Read more. ROLLS S2-1046 GEL, 920AH 2V Read more. Rolls Surrette S-550 Read more. Rolls Surrette S6-460 AGM 6Volt L16 Battery Read more
Cost Efficient Lighting: Solar Street Lights
Photo voltaic street lights or integrated solar street lights as they are commonly called are raised light foundations that are charged and powered by photo voltaic cells or panels that are mostly mounted on the structure at the topmost positions in the pole itself. The photo voltaic panels charge provide power and charge to a rechargeable cell or battery which powers the LED lamps at night.Features of a solar street light:Almost all the solar street light has automatic sensors that can automatically sense the outdoor sunlight and can automatically turn on and off. The solar street lights are designed to function fully throughout the night without any failure. Many integrated solar street light can stay on for more than one night even if the sun is not available for a couple of days.The solar lights that are installed in specific windy areas have been equipped with flat panels to better survive the strong winds. The updated models of solar street lights use wireless technology and fizzy control theory for better battery management. These street lights mainly use the technology of a network operation where one light can perform perfectly while the other would stay off.Parts of a Solar Street Light:The main part of a solar street light is the solar panel that converts solar energy to electricity with the help of photo voltaic cells. Two types of solar panels are available:· Mono crystalline: The conversion rate is much faster and they are quite expensive.· Poly-crystalline: The conversion rate is slower and produces less power.LED is the next component and is the lighting source of most of the street lights. It provides much more lumen while consuming less power. The energy consumed by LED is 50% lesser then the standard HPS which is used in traditional street lights and lamp poles.Rechargeable Battery: Most of the Solar Street Light in China has a strong battery than can store electric charge converted from solar charge consumed during the day light and provide power at night.Advantages of Solar Street Light:· They are self-governing that is they don't need a utility grid so the operation cost is quite less.· They require less maintenance so less maintenance cost.· The risks of shocks are limited as there are no external wires or connections.· It is the best form of Eco-friendly technology.· It allows the saving of energy and cost too. Follow us on Our Social Profiles Links: com/dihongzm/.·RELATED QUESTIONWhy don't hotel rooms have ceiling lights?My hotel building is over 100 years old, so we have ceiling lights. We also need a ladder to change a bulb 11' from the floor. It can take 20 minutes for 1 bulb! This is one reason that we have changed to the longer lasting (and more economical) low-energy bulbs.I would be delighted to have wall lights instead. Retro-fitting them would however be even less economically sound.Higher than average ceilings mean ladders to change the bulbs in ceiling fittings, and this extends the maintenance time and convenience for staff enormously. Even normal height ceilings mean that a chair is needed to swap a bulb out. Wall fittings are so much more convenient for both staff and customers, reducing the time taken to get light again!As Michael Forrest Jones says - anything other than a simple bulb swap requires the power to be cut to the whole circuit (which may be more than just a few rooms). This makes it very awkward to do emergency repairs after dark! -- Been there done that... Go with wall fittings that can be isolated in-room!In short:I have ceiling lights.I don't like them, as they are awkward for maintenance.Replacing them would be expensive and extremely difficult - basically a total rewire of the hotel lighting system.Design engineers are not stupid. they note the first 2 points!
How Much Atmospheric Nitrogen Can We Replace with Other Gasses Without Causing Problems for Human He
From a mammalian respiration point of view, you can replace Nitrogen with any inert gas from the periodic table. For example, Helium-Oxygen mixtures are used by saturation divers to avoid nitrogen dissolving into their blood at the high pressures of deep-sea diving. While there are medical complications arising from the high atmospheric pressure, the gases they breath don't appear to pose health risks.From a planetary lifecycle, everything living thing needs nitrogen since DNA uses nitrogen bases. For terrestrial species, bacteria in the ground and lightening generate nitrogen compounds that plants absorb. We get our nitrogen from eating plants and animals that eat plants.To maintain the lifecycle of our planet without altering how nitrogen fixation works, you'll need to keep $N_2$ concentrations relatively high to ensure that $N_2$ diffusion into the soil (where the bacteria live) still works effectively. The concentration of $N_2$ in the soil approximates the atmospheric levels. If the concentration of atmospheric nitrogen was $35%$ instead of $79%$ the concentration of $N_2$ in the soil couldn't rise above that level since it is determined by the principles of diffusion. How this would impact plant life is difficult to estimate. At some threshold, you'd constrain the amount of plant life, but where that threshold is was not something I could determine in my casual research of the topicThis question already has answers here: What is my breathable atmosphere composed of? (6 answers) Closed 6 months ago.I know we need nitrogen to live, but what happen if we reduce the proportion of nitrogen in air (replacing it with another substance)?What percentage can I replace without risking health of humans or animals in my fantasy world?EDIT: To be more clear in my current case: I have invented an new element in my fantasy world that does not exist in reality. I want integrate it into the atmosphere (mix into the air) of my world. If I just add this element without replacing anything else, the air will be more dense. Instead of that, I am asking how much I can reduce the percentage of nitrogen and replace it with my new substance without preventing humans and animals from breathing.
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